CN109882206A - It is a kind of for controlling more supporting Synergistic methods of coal mine breaking surrounding rock - Google Patents
It is a kind of for controlling more supporting Synergistic methods of coal mine breaking surrounding rock Download PDFInfo
- Publication number
- CN109882206A CN109882206A CN201910280169.XA CN201910280169A CN109882206A CN 109882206 A CN109882206 A CN 109882206A CN 201910280169 A CN201910280169 A CN 201910280169A CN 109882206 A CN109882206 A CN 109882206A
- Authority
- CN
- China
- Prior art keywords
- rock
- cementing
- contractibility
- frame
- country rock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of for controlling more supporting Synergistic methods of coal mine breaking surrounding rock, on support time, contractibility trellis supports country rock is used first, and then cementing to the progress slip casting of breaking surrounding rock part, finally using may extend away anchor rod anchored cementing breaking surrounding rock and original complete country rock；In support space, contractibility trellis supports limit country rock surface initial deformation, table is protected using antiseep flexible layer in country rock surface simultaneously, prevent grouting serous fluid from leaking, country rock superficial part breaking surrounding rock is cementing using slip casting, then is coupled the cementing breaking surrounding rock of superficial part and the anchoring of original complete country rock using extensible anchor pole toward deep；On supporting intensity, the gravity of contractibility trellis supports broken segment country rock, make broken range that Quick Extended not occur, cementing country rock overall structure is capable of forming after breaking surrounding rock slip casting is cementing, and intensity can carry self gravity, it may extend away anchor rod anchored intensity to be determined according to surrouding rock deformation rate, for the purpose of reaching more supporting Collaborative Control country rock stead deformations.
Description
Technical field
It is specifically a kind of for controlling coal mine breaking surrounding rock the present invention relates to a kind of method for protecting support of coal mine breaking surrounding rock
More supporting Synergistic methods.
Background technique
Deep mining is that current coal resources in China utilizes the important topic faced.Under the condition of high ground stress of deep, tunnel
It excavates off-load rear perimeter edge country rock to be crushed rapidly, under working face extraction disturbing influence, roadway surrounding rock fracture area is constantly expanded, and is formed
A wide range of fracture area.If not taking effective control measure, deep tunnel large deformation unstable failure is easily caused.Current
Engineering practice shows that existing support theory and technology have been not applied for the control of a wide range of breaking surrounding rock of deep tunnel, has
Body are as follows: (use bolt and cable anchor supporting) in terms of active support theory and supporting construction: there are supporting intensities for it not enough, branch
Protect the problems such as range is too small and the compatible deformation scarce capacity of supporting construction.Since the above problem leads to a large amount of anchor occurred
The phenomenon that bar, anchor cable are broken or anchor pole, anchor cable are with breaking surrounding rock entirety inbreak.In addition the active supports such as existing anchor pole, anchor cable
The elongation percentage of structure is generally difficult to adapt to the deformation of a wide range of breaking surrounding rock in deep.Passive protecting theory and configuration aspects (i.e.
Supporting is carried out using frame): it is all difficult by field research and the either rigid frame of theoretical calculation discovery or contractibility frame
To contend with huge crustal stress, due to the effect of crustal stress, so that deep crush rock deformation is big, and deforms unevenly,
Frame is ultimately caused to lose, distort and be broken.It sees on the whole, main problem existing for existing support theory is sufficiently to adjust
The self-bearing capacity in dynamic tunnel deep and superficial country rock could not form supporting-country rock collaboration bearing structure, to cannot achieve height
The Quadratic Stability of stress breaking surrounding rock.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of for controlling more supportings of coal mine breaking surrounding rock
Synergistic method is carried using frame supporting, the cementing country rock of slip casting and anchor rod anchored collaboration, to guarantee high stress breaking surrounding rock
Stability.
To achieve the goals above, the technical solution adopted by the present invention is that: it is a kind of for controlling the more of coal mine breaking surrounding rock
Supporting Synergistic method, specific steps are as follows:
A, frame supporting:
A, during tunnelling, the empty top zone formed after development machine cutting, before being used as using more seamless steel pipes
Visit beam gib；Horizontal 1~2 single u-shaped girder steel above forestope gib, is successively laid with one layer of metal mesh on girder steel
With one layer of antiseep flexible layer, then the gap between antiseep flexible layer and back country rock is filled out using timber wedge or bamboo chip
Fill fastening；As the cutting of development machine is after empty top zone range reaches the placement space of a contractibility frame, using contractibility
Frame applies certain pre- support force and is supported to empty top zone；Inclined gallery use anti-skid device；
B, the embedded bar of 1 meter of multiple length or more is installed in wall, wherein the pre-buried depth of reinforcing bar is not less than overall length
The 2/3 of degree；It is in forestope Forward, the exposed parts of one end of seamless steel pipe each in forestope and embedded bar are fixed slotting
Fixation is connect, then the other end of each seamless steel pipe is fixed using scraper chain, and the Forward of forestope is fixed in completion；
C, after forestope completes fixed, staff, which enters in temporary support area, at this time builds contractibility frame, can contract
Property frame to empty top zone stablize supporting after, gib is removed；Spacing between contractibility frame is according to different country rock items
Part and its required support resistance are determined；
D, according to the changing rule of stress during the experimental determination frame changing of the relative positions, resistance is supported on real-time judgment frame
Variation, then according to the requirement of trellis supports resistance, by tightening or loosening adjustment trellis supports resistance；
B, the cementing country rock of slip casting:
I, after completing tunnelling, the rock sample of live breaking surrounding rock is chosen, carries out slip casting cementitious test in laboratory, from
And obtain different cementing match the corresponding breaking surrounding rock it is cementing after intensity, the final proportion for determining that slip casting is cementing, so that slurry
The cementing rock mass strength that liquid-country rock is formed is not less than original Surrounding Rock Strength；
II, the country rock superficial part after contractibility frame supporting lays a certain number of Shallow hole grouting pipes, then by each
Shallow hole grouting pipe is cementing cementing with the progress slip casting of tunnel superficial breaking surrounding rock is compared using the slip casting that step I determines, until country rock
The completely cementing rear stopping of the breaking surrounding rock of surface to superficial part, makes breaking surrounding rock form the cementing rock mass of country rock；
C, anchor rod anchored:
1. after country rock cement rock body is formed, drilling is set in the country rock between two contractibility frames, using extensible
Anchor pole protrudes into drilling and carries out end anchorage；The length of the extensible anchor pole is determined according to rock crusher range；
2. real-time monitoring may extend away the stress value on anchor pole and contractibility frame, so the prestressing force both adjusted make this two
After stress in kind supporting construction is close, and stress variation and deflection reach unanimity, adjustment process is completed, finally realizes frame
The integrated bearing system of supporting, the cementing country rock of slip casting and anchor rod anchored collaboration.
Further, roadway's sides control two using mode identical with empty top zone supporting and help country rock surface in step a
Deformation.
Further, the scraper plate Similarity Between Line Segments are ellipse, and each seamless steel pipe is equipped with no less than 2 scraper chains.
Further, the contractibility frame is arch contractibility frame or trapezoidal contractibility frame.
Compared with prior art, the present invention using frame supporting, the cementing country rock of slip casting and it is anchor rod anchored combine mode,
1) on support time, first using country rock broken immediately behind contractibility trellis supports pick lane.Then, to broken
Country rock part carries out superficial slip casting.Finally, using may extend away anchor rod anchored cementing breaking surrounding rock and original complete country rock.
2) in support space, country rock surface initial deformation is limited using contractibility trellis supports, while country rock surface is adopted
Table is protected with antiseep flexible layer, prevents superficial wall rock grouting slurries from leaking.Country rock superficial part breaking surrounding rock is cementing then past using slip casting
The cementing breaking surrounding rock of superficial part and the anchoring of original complete country rock are coupled by deep using extensible anchor pole.
3) on supporting intensity, the gravity of contractibility trellis supports broken segment country rock does not occur that broken range quickly
Extension.Cementing country rock overall structure is capable of forming after breaking surrounding rock slip casting is cementing, and intensity can carry self gravity.It is extensible
Anchor rod anchored intensity is determined according to surrouding rock deformation rate, is reached for the purpose of controlling country rock stead deformation.
4) in integer support structure, after three kinds of support forms apply, the axle power on anchor pole is cooperateed with trellis supports resistance
Unanimously, the cementing rock deformation of slip casting and frame can contracting amount and anchor pole elongation it is harmonious；It is final to realize frame supporting, note
It starches cementing country rock and anchor rod anchored collaboration integration carries out coal mine deep crush Surrounding Rock Control.
This monolithic construction is in roadway surrounding rock load bearing process, and initial stage, higher support resistance was from trellis supports
And the breaking surrounding rock structural body support recombinated after cementing-anchoring, collaboration carrying and deformability are then due in breaking surrounding rock
The noncontinuity in portion itself and the contractibility of support construction and the extendability of anchor structure are realized.Further, since broken
For country rock by centainly cementing and anchoring, breaking surrounding rock is capable of forming larger block (such as anchoring string body), shrinks in compression
In the process can be engaged, it is capable of forming the bearing structure of " class arch " or " combination rock beam type ", so that it is broken to reach control
The supporting purpose of broken country rock.
Detailed description of the invention
Fig. 1 is the cross-sectional view of gib in the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the schematic diagram that the present invention carries out the contractibility frame supporting stage；
Fig. 4 is the schematic diagram that the present invention carries out the slip casting cementing stage；
Fig. 5 is the schematic diagram that the present invention carries out the anchor rod anchored stage；
Fig. 6 is the structural schematic diagram that integer support is completed using trapezoidal contractibility frame；
Fig. 7 is the structural schematic diagram that integer support is completed using arch contractibility frame.
In figure: 1, embedded bar；2, antiseep flexible layer；3, scraper chain；4, pressure network material；5, U-shaped steel beam；6, metal
Net；7, seamless steel pipe；8, roadway floor country rock；9, contractibility frame；10, breaking surrounding rock；11, roadway's sides country rock；12, tunnel
Roof rock；13, the cementing rock mass of country rock；14, Shallow hole grouting pipe；15, it may extend away anchor pole；16, it may extend away anchor rod anchored end.
Specific embodiment
The present invention will be further described below.
As shown, specific steps of the invention are as follows:
A, frame supporting:
A, during tunnelling, the empty top zone formed after development machine cutting, before being used as using more seamless steel pipes 7
Visit beam gib；Horizontal 1~2 single u-shaped girder steel 5, is successively laid with one layer of metal on girder steel above forestope gib
Net 6 and one layer of antiseep flexible layer 2 (it uses the antiseeps flexible material such as air duct fabric to be made), then (such as using pressure network material 4
Timber wedge or bamboo chip) gap filling between antiseep flexible layer 2 and back country rock 12 is fastened；With the cutting of development machine
After range reaches the placement space of a contractibility frame 9 when empty top zone, apply certain pre- support force using contractibility frame 9
Empty top zone is supported；Inclined gallery use anti-skid device；
B, the embedded bar 1 of 1 meter of multiple length or more is installed in wall, wherein the pre-buried depth of reinforcing bar is not less than overall length
The 2/3 of degree；In forestope Forward, the exposed parts of one end of seamless steel pipe 7 each in forestope and embedded bar 1 are fixed
It is plugged and fixed, then the other end of each seamless steel pipe 7 is fixed using scraper chain 3, and the Forward of forestope is fixed in completion；
C, after forestope completes fixed, staff, which enters in temporary support area, at this time builds contractibility frame 9, can contract
Property frame 9 to empty top zone stablize supporting after, gib is removed；Spacing between contractibility frame 9 is according to different country rocks
Condition and its required support resistance are determined；
D, according to the changing rule of stress during the experimental determination frame changing of the relative positions, resistance is supported on real-time judgment frame
Variation, then according to the requirement of trellis supports resistance, by tightening or loosening adjustment trellis supports resistance；
B, the cementing country rock of slip casting:
I, after completing tunnelling, the rock sample of live breaking surrounding rock 10 is chosen, carries out slip casting cementitious test in laboratory,
To obtain different cementing match the corresponding breaking surrounding rock 10 it is cementing after intensity, the final proportion for determining that slip casting is cementing makes
It obtains the cementing rock mass strength that slurries-country rock is formed and is not less than original Surrounding Rock Strength；
II, the country rock superficial part after 9 supporting of contractibility frame lays a certain number of Shallow hole grouting pipes 14, then by each
A Shallow hole grouting pipe 14 carries out the cementing (note of slip casting with comparison tunnel superficial breaking surrounding rock 10 using the slip casting that step I determines is cementing
Slurry pressure should not be too large, in order to avoid the bulging of country rock surface is caused to destroy), until breaking surrounding rock 10 complete glue of the country rock surface to superficial part
Stop after knot, breaking surrounding rock is made to form the cementing rock mass 13 of country rock；
C, anchor rod anchored:
1. after the cementing rock mass 13 of country rock is formed, drilling is set in the country rock between two contractibility frames 9, use can prolong
It stretches anchor pole 15 and protrudes into drilling progress end anchorage；The length of the extensible anchor pole 15 is determined according to rock crusher range；If
Broken range is excessive, then needs the extensible anchor pole 15 using extensible；Extensible anchor pole 15 need to apply certain prestressing force, but not
More than the stress value for extending it；Extensible anchor pole 15 is that existing structure is provided simultaneously with biggish with certain Support Resistance
Elongation percentage；
2. real-time monitoring may extend away the stress value on anchor pole 15 and contractibility frame 9, and then the prestressing force for adjusting the two makes
After stress in both supporting construction is close, and stress variation and deflection reach unanimity, adjustment process is completed, it is final to realize
The integrated bearing system of frame supporting, the cementing country rock of slip casting and anchor rod anchored collaboration.
Further, roadway's sides control two using mode identical with empty top zone supporting and help country rock surface in step a
Deformation.
Further, 3 shape of scraper chain is ellipse, and each seamless steel pipe 7 is equipped with no less than 2 scraper chains.
Further, the contractibility frame 9 is arch contractibility frame or trapezoidal contractibility frame.
Claims (4)
1. a kind of for controlling more supporting Synergistic methods of coal mine breaking surrounding rock, which is characterized in that specific steps are as follows:
A, frame supporting:
A, during tunnelling, the empty top zone formed after development machine cutting, using more seamless steel pipes as forestope
Gib；Horizontal 1~2 single u-shaped girder steel above forestope gib, is successively laid with one layer of metal mesh and one on girder steel
Layer antiseep flexible layer is then tight by the gap filling between antiseep flexible layer and back country rock using timber wedge or bamboo chip
Gu；As the cutting of development machine is after empty top zone range reaches the placement space of a contractibility frame, using contractibility frame
Apply certain pre- support force to be supported empty top zone；
B, the embedded bar of 1 meter of multiple length or more is installed in wall, wherein the pre-buried depth of reinforcing bar is not less than total length
2/3；In forestope Forward, the fixed grafting of the exposed parts of one end of seamless steel pipe each in forestope and embedded bar is consolidated
Fixed, then the other end of each seamless steel pipe is fixed using scraper chain, and the Forward of forestope is fixed in completion；
C, after forestope completes fixed, staff, which enters in temporary support area, at this time builds contractibility frame, contractibility canopy
After frame stablizes supporting to empty top zone, gib is removed；Spacing between contractibility frame according to different wall rock condition and
Support resistance needed for it is determined；
D, according to the changing rule of stress during the experimental determination frame changing of the relative positions, the change of resistance is supported on real-time judgment frame
Change, then according to the requirement of trellis supports resistance, by tightening or loosening adjustment trellis supports resistance；
B, the cementing country rock of slip casting:
I, after completing tunnelling, the rock sample of live breaking surrounding rock is chosen, carries out slip casting cementitious test in laboratory, thus
Out different cementing match the corresponding breaking surrounding rock it is cementing after intensity, the final proportion for determining that slip casting is cementing, so that slurries-enclose
The cementing rock mass strength that rock is formed is not less than original Surrounding Rock Strength；
II, the country rock superficial part after contractibility frame supporting lays a certain number of Shallow hole grouting pipes, then passes through each shallow bore hole
Grouting Pipe is cementing cementing with the progress slip casting of tunnel superficial breaking surrounding rock is compared using the slip casting that step I determines, until country rock surface
To the completely cementing rear stopping of breaking surrounding rock of superficial part, breaking surrounding rock is made to form the cementing rock mass of country rock；
C, anchor rod anchored:
1. after country rock cement rock body is formed, drilling is set in the country rock between two contractibility frames, using extensible anchor pole
It protrudes into drilling and carries out end anchorage；The length of the extensible anchor pole is determined according to rock crusher range；
2. real-time monitoring may extend away the stress value on anchor pole and contractibility frame, and then the prestressing force for adjusting the two makes both branch
After stress on protection structure is close, and stress variation and deflection reach unanimity, adjustment process is completed, it is final to realize frame branch
The integrated bearing system of shield, the cementing country rock of slip casting and anchor rod anchored collaboration.
2. according to claim 1 a kind of for controlling more supporting Synergistic methods of coal mine breaking surrounding rock, which is characterized in that
Roadway's sides control two deformations for helping country rock surface using mode identical with empty top zone supporting in step a.
3. according to claim 1 a kind of for controlling more supporting Synergistic methods of coal mine breaking surrounding rock, which is characterized in that
The scraper plate Similarity Between Line Segments are ellipse, and each seamless steel pipe is equipped with no less than 2 scraper chains.
4. according to claim 1 a kind of for controlling more supporting Synergistic methods of coal mine breaking surrounding rock, which is characterized in that
The contractibility frame is arch contractibility frame or trapezoidal contractibility frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910280169.XA CN109882206B (en) | 2019-04-09 | 2019-04-09 | Multi-support cooperative method for controlling coal mine broken surrounding rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910280169.XA CN109882206B (en) | 2019-04-09 | 2019-04-09 | Multi-support cooperative method for controlling coal mine broken surrounding rock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109882206A true CN109882206A (en) | 2019-06-14 |
| CN109882206B CN109882206B (en) | 2020-05-22 |
Family
ID=66936564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910280169.XA Active CN109882206B (en) | 2019-04-09 | 2019-04-09 | Multi-support cooperative method for controlling coal mine broken surrounding rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109882206B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983462A (en) * | 2019-12-12 | 2021-06-18 | 南京宝地梅山产城发展有限公司 | Method for supporting integral arch body of underground roadway |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08210098A (en) * | 1995-11-01 | 1996-08-13 | Sumitomo Osaka Cement Co Ltd | Invert structure |
| CN103174435A (en) * | 2013-02-26 | 2013-06-26 | 中国矿业大学(北京) | Roadway support method adopting U-shaped canopy frame support structure body |
| CN104895583A (en) * | 2015-04-28 | 2015-09-09 | 河南理工大学 | Tunnel surrounding rock control technology combining pressure relief and slip-casting reinforcement |
| CN105134269A (en) * | 2015-08-17 | 2015-12-09 | 河南理工大学 | Control technology for roadway surrounding rock achieving cooperative load bearing by enabling anchor cables to penetrate through sheds |
| WO2016095629A1 (en) * | 2014-12-15 | 2016-06-23 | 中铁第四勘察设计院集团有限公司 | Advanced support structure for oversized variable-cross-section tunnel |
| CN106761867A (en) * | 2016-12-23 | 2017-05-31 | 四川广旺能源发展（集团）有限责任公司 | High-dipping surrounding rock of actual mining roadway stabilization supporting facility and support process |
| CN106948842A (en) * | 2017-03-31 | 2017-07-14 | 兖州煤业股份有限公司 | A kind of scaffolding structure for being used under thin dirt band cover coal road |
| CN109372556A (en) * | 2018-09-30 | 2019-02-22 | 淮阴工学院 | A kind of sandwich arch and construction method suitable for high stressed soft rock tunnel supporting roadway surrounding rock |
-
2019
- 2019-04-09 CN CN201910280169.XA patent/CN109882206B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08210098A (en) * | 1995-11-01 | 1996-08-13 | Sumitomo Osaka Cement Co Ltd | Invert structure |
| CN103174435A (en) * | 2013-02-26 | 2013-06-26 | 中国矿业大学(北京) | Roadway support method adopting U-shaped canopy frame support structure body |
| WO2016095629A1 (en) * | 2014-12-15 | 2016-06-23 | 中铁第四勘察设计院集团有限公司 | Advanced support structure for oversized variable-cross-section tunnel |
| CN104895583A (en) * | 2015-04-28 | 2015-09-09 | 河南理工大学 | Tunnel surrounding rock control technology combining pressure relief and slip-casting reinforcement |
| CN105134269A (en) * | 2015-08-17 | 2015-12-09 | 河南理工大学 | Control technology for roadway surrounding rock achieving cooperative load bearing by enabling anchor cables to penetrate through sheds |
| CN106761867A (en) * | 2016-12-23 | 2017-05-31 | 四川广旺能源发展（集团）有限责任公司 | High-dipping surrounding rock of actual mining roadway stabilization supporting facility and support process |
| CN106948842A (en) * | 2017-03-31 | 2017-07-14 | 兖州煤业股份有限公司 | A kind of scaffolding structure for being used under thin dirt band cover coal road |
| CN109372556A (en) * | 2018-09-30 | 2019-02-22 | 淮阴工学院 | A kind of sandwich arch and construction method suitable for high stressed soft rock tunnel supporting roadway surrounding rock |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983462A (en) * | 2019-12-12 | 2021-06-18 | 南京宝地梅山产城发展有限公司 | Method for supporting integral arch body of underground roadway |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109882206B (en) | 2020-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102996149B (en) | Support method for bolt-grouting composite crushing dynamic-pressure roadway soft rock roof by high-pre-stressed anchor cable | |
| CN103233740B (en) | Top-cutting roadway coal-pillar-free mining method of close-range thin coal seam | |
| CN108412542A (en) | A kind of wide lane digging gangue paste body filling of high seam is at lane method | |
| CN108915720B (en) | A kind of large cross-section tunnel passes through fault belt construction method | |
| Xie et al. | Stability analysis of integral load-bearing structure of surrounding rock of gob-side entry retention with flexible concrete formwork | |
| CN106481343A (en) | A kind of Soft Rock Tunnel Excavation and preliminary bracing method | |
| CN104895073B (en) | Can being dismounted for multiple times anchor cable construction system and its construction method | |
| CN108775252A (en) | The supporting construction and method for protecting support in Deep Soft Rock tunnel | |
| CN103388481A (en) | Combined prefabricated slab for governing floor heave and method for governing floor heave | |
| RU2125652C1 (en) | Method of extracting operations | |
| CN106246191B (en) | A kind of hole body is dredged, fills plentiful large-scale karst cave treatment and tunnel excavation method deeply | |
| CN109555548A (en) | A kind of supporting construction that high-ground stress Support System in Soft Rock Tunnels is formed using overlength enlarged footing anchor cable | |
| CN112252342A (en) | Steel wire grid net protection and construction method for rock slope broken rock mass | |
| CN114635720A (en) | Large-section deep-buried soft rock tunnel combined supporting system and construction method | |
| CN109838253B (en) | Large-circulation combined beam type temporary support roof control device and construction method thereof | |
| CN105952459B (en) | A kind of tunnel pin-connected panel preliminary bracing method | |
| CN212359785U (en) | Yielding primary support structure for controlling large deformation of high-ground-stress soft rock tunnel | |
| CN109882206A (en) | It is a kind of for controlling more supporting Synergistic methods of coal mine breaking surrounding rock | |
| CN109958454A (en) | Stope drift active workings pucking control system and its control method | |
| CN107503768B (en) | The method of the oblique Soil-nailed of overlying strata soil on Small Data Sets shallow embedding tunnel | |
| CN106761841B (en) | Working face tailgate fractured coal grouting reinforcement method | |
| CN110513129B (en) | Advanced roof-protecting supporting structure and method for roadway of soft and thick coal seam working face | |
| CN205532652U (en) | Rock cross -cut coal uncovering 's enhancement supporting construction under complex geological condition | |
| CN111852505A (en) | Yielding primary support system for large deformation control of high-ground-stress soft rock tunnel | |
| CN208534512U (en) | The supporting construction in Deep Soft Rock tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |